Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f93cec430ef844c…

MALICIOUS

PDF

73.4 KB Created: 2021-04-03 14:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 765105704372932d385620414aaddc37 SHA-1: 720d17577be22dee22f982d26f3f6a24e38b7a40 SHA-256: 9f93cec430ef844cb0b10260621526cea0836395673925715bfccba7b7b91843
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple critical heuristics as malicious, including ClamAV detection and an ML classifier. It contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting, suggesting a phishing or scam campaign. The document body, though partially corrupted, indicates a lure related to connecting DirecTV to an Insignia TV.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/strik?utm_term=how+to+connect+directv+to+insignia+tv In PDF document text
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/mozurojajile-lubefuma.pdfIn PDF document text
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/2e18b71e9.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/hhepigd/giwisile.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/F2jgLgh/music_lines_labeled.pdfIn PDF document text
    • https://jesomufufasak.weebly.com/uploads/1/3/1/8/131872286/7636043.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/fedijurulobu_zuvowukiledanad_zujatamedivebiz_venudinatiko.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/7543564.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/4038480.pdfIn PDF document text
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/tupesovetobipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_707ae252c4da4c238b7efa388ebe7b9c.pdf?index=trueIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_46b5177fd94a487ea5a9ceab730d89fb.pdf?index=trueIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_e2ac4378264449c1a4ecb1425c5b0357.pdf?index=trueIn PDF document text
    • http://vagoposejexuma.epizy.com/ritatuvutitusiwaraj.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/ghatna_chakra_reasoning_book_free_download.pdfIn PDF document text
    • https://a539eca0-ed6d-4e39-a9fd-63162facd464.filesusr.com/ugd/8170ee_fcf484d654a94aa09c83e1eb2814a3e9.pdf?index=trueIn PDF document text
    • http://zumoriko.epizy.com/gender_essentialism_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/gozugutedumu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 5188 bytes
SHA-256: dbf3a9a2b0582b4b73c06db5088edbced3c06d18726a0c701b413e9270f86db6
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 10980 bytes
SHA-256: 2c3a1357e3ba92f461638aecfc9a0fd91c48d19cd5c7e149ab4383d8bfd797f9